"17 Again" tells the story of Mike O'Donnell (Matthew Perry) who as a teenager was on top of the world. He was really popular in school, a star on the basketball team ready for college ball and in love with his high school sweetheart. On the day of his big basketball game, his girlfriend Scarlett (Leslie Mann)comes to him and tells him she is pregnant. Mike's reaction is to not play in the game and ask Scarlett to marry him. Fast forward to when they are adults, married and living with 2 kids in a average life. Mike can't help but wonder what his life would have been like if he had played in the big high school game and gone onto college basketball. This annoys Scarlett and she asks him to leave. Mike heads to his old high school to relive some memories, but gets sidetracked as he come across a man about to jump off a bridge. Due to some time warp of sorts the next morning when Mike wakes up, he finds himself in the body of a 17 year old again. (Zac Efron). It is at this point he decides he is going to go back to his old high school in order to figure out where his normal life went off course.